/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package air.servlet;

import air.eb.Flightinstance;
import air.sb.AirRemote;
import air.sb.LuftRemote;
import air.sb.RemoteAir;
import air.sb.SASRemote;
import java.io.*;
import java.util.*;
import javax.ejb.EJB;
import javax.naming.*;
import javax.servlet.ServletException;
import javax.servlet.http.*;

/**
 *
 * @author JonasF
 * Handles the call from HttpRequestHandler and handels the ChooseTrip request by calling
 * the session AirBean and redirects to the right JSPX-page
 */
public class ChooseTrip extends HttpServlet {

    @EJB
    private SASRemote sASBean;
    @EJB
    private AirRemote airBean;
    @EJB
    private LuftRemote luftBean;

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        ArrayList<Flightinstance> list;
        int test = 0;
        try {
            //Finds the number of connections and loops through all of the and puts
            //them in a list. That list is then sent to the AirBean
            String flight = request.getParameter("route");
            ArrayList<Flightinstance> route = new ArrayList<Flightinstance>();
            Flightinstance fi = null;
            if ((fi = airBean.getFlightinstanceByPK(flight)) != null) {
                test = 1;
            } else if ((fi = luftBean.getFlightinstanceByPK(flight)) != null) {
                test = 2;
            } else if ((fi = sASBean.getFlightinstanceByPK(flight)) != null) {
                test = 3;
            }
            if (fi == null) {
                response.sendRedirect("Error.jspx");
                out.close();
                return;
            }
            route.add(fi);
            ArrayList<String> flights = new ArrayList<String>();
            flights.add(flight);
            switch (test) {
                case 1:
                    airBean.findFlightSeats(flights);
                    airBean.setRoute(route);
                    break;
                case 2:
                    luftBean.findFlightSeats(flights);
                    luftBean.setRoute(route);
                    break;
                case 3:
                    sASBean.findFlightSeats(flights);
                    sASBean.setRoute(route);
                    break;
            }
        } finally {
            //redirects to the right JSPX
            response.sendRedirect("BookTrip.jspx");
            out.close();
        }
    }

    private AirRemote lookupAirBean() {
        try {
            Context c = new InitialContext();
            return (AirRemote) c.lookup("java:comp/env/AirBean");
        } catch (NamingException ne) {
            java.util.logging.Logger.getLogger(getClass().getName()).log(java.util.logging.Level.SEVERE, "exception caught", ne);
            throw new RuntimeException(ne);
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
